Escape behaves strange the first time it's captured raw

I followed the tutorial at the end of this page to capture output without printing:
https://python-prompt-toolkit.readthedocs.io/en/master/pages/asking_for_input.html
With some small modifications like making it a async context manager that don't matter for the problem and test.

#! /usr/bin/env python3

import asyncio

from prompt_toolkit.input import create_input
from prompt_toolkit.keys import Keys


async def main() -> None:
    done = asyncio.Event()
    input = create_input()
    def keys_ready():
        print('was called')
        for key_press in input.read_keys():
            print(key_press)
            if key_press.key == 'escape' or key_press.key == 'c-c': #esc or control-c
                print('asked for exit')
                done.set()
    
    with input.raw_mode():
        with input.attach(keys_ready):
            await done.wait()


if __name__ == "__main__":
    asyncio.run(main())

you can see the problem here, at least for me. When i press 'ESCAPE' the first time, the function keys_ready is called but doesn't print a keypress. The second time it works.

So the iterator is returning a empty iterator on the first press of escape (only as far as i can tell, other keys work).

Run the provided asyncio script and reproduce the first Escape press producing no keypress. Start by tracing create_input(), raw_mode(), attach(), and read_keys() in prompt_toolkit.input, then verify that the first Escape is delivered and the existing control-C behavior still works.